/*-
 * Copyright (c) 2011 Ondrej Fischer <ondrej.fischer@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef  EXPRESS_MUTEX_HPP
#define  EXPRESS_MUTEX_HPP

#include <pthread.h>


namespace express {


    class PThreadException {
        
        private:
            int code;
            
        public:
            PThreadException(int return_code): code(return_code) {}
            int getCode() {return code;}
            
    };


    class MutexException : public PThreadException {
        public:
            MutexException(int return_code): PThreadException(return_code) {}
    };


    class ConditionException : public PThreadException {
        public:
            ConditionException(int return_code): PThreadException(return_code) {}
    };



    /**
     * Class Mutex
     */
    class Mutex {

        public:

        class Condition {
            
            private:
                pthread_cond_t* cond;
                Mutex* _mutex;
                
                Condition(Mutex* mutex);
                static void check_exception(int return_code);
                
                
            public:
                ~Condition();
                
                void   wait();
                void   signal();
                void   broadcast();
                Mutex* mutex();
                
                friend class Mutex;
                
        };
        
        enum Type {
            errorcheck = PTHREAD_MUTEX_ERRORCHECK,
            recursive  = PTHREAD_MUTEX_RECURSIVE,
            normal     = PTHREAD_MUTEX_NORMAL,
            adaptive   = PTHREAD_MUTEX_ADAPTIVE_NP
        };


        private:
            pthread_mutex_t*     mutex;
            pthread_mutexattr_t* attr;

            static void check_exception(int return_code);


        public:
            Mutex(Type type);
            ~Mutex();
            void lock();
            void unlock();
            Condition* condition();

        friend class Condition;


    };



};

#endif //EXPRESS_MUTEX_HPP


